I've had desktops and laptops for YEARS Some with Windows 98 - Some with ME - Some wtih XP - ALL of which were totally capable of adjusting to, and worked great minus a couple quirks specific to that OS..
NOT VISTA!!! IS SUCKS!!!! I absolutely HATE IT and am so sick of seeing that little spinny "wait" symbol and "NOT RESPONDING" errors that I actually look forward to coming to my office to use my Desktop with ME over my BRAND NEW IMB with Vista!!
I am sooooo getting Windows 7 asap!!!!